Was there ever an Olivetti that was 'standard'?
I never dealt with the M24, but the M380... AAAAARGH!
The PSU would die after 2 years. The insulation on a coil melted and it shorted out, if I remember correctly.
And the memory expansion cards...
Those long, horrible cards with 16 sockets. And the yard-long 'configuration card you used to find out the switch settings.
The fact that the keyboard connector was a D9 connector was just a fun, quirk.
(St506 drives in a 1990s PC, though... not so fun)